Concrete placement apparatus



D. 31, 1946. C. JAK$ N 2,413,632'

CONCRETE PLACEMENT APPARATUS Filed April 13, 1942 Patented Dec. 31, 1946 UNIT ED STATES PATENT OFFICE CONCRETE PLACEMEN` APPARATUS Coi-will Jackson, Ludington, Mich.

Application April v13, 194,2, Serial No. 438,757

12 Claims.

This invention relates to improvements in concrete placement apparatus.

The `main objects of this invention are:

First, to provide a concrete Apavement apparatus which is well adapted for .use in widening of pavements.

Second, to provide a concrete placement apparatus of this character which is eilic'ient and of large capacity, enabling the very rapid widening of paved highways and the like.

Objects relating to details and economies of' the invention will appear from the description to follow. Theinvention is defined and 'pointed `out in `the claims.

A ,preferred embodiment of the invention is illustrated in the accompanying drawing, in which:

Fig. 1 is afragmentaryplan View of a concrete placement .apparatus embodying the features of my invention lshown `in operative relation 'to a pavement Vbeing vwidened and to a upropelling tractor and mixer indicatedby dotted lines.

Fig. 2 is an enlarged fragmentary view partially in longitudinal section on a 'line correspending to linelZ-Z of Fig. 1.

Fig. 3 is an enlarged fragmentary transverse section on line ;3-'3 of Fig. l.

Fig 4 is a fragmentary horizontal vsection on line ii-d of `Fijgx2 showing details of the ystrikeoff member.

It is, 'under 'present conditions, frequently -de- -s'ired't-o widen paved highways and itis desirable 'to do that 'as rapidly as possible consistent with a satisfactory pavement. `My present invention is designed to enable the `very rapid widening of pavements and Aat `the same 'time provide la `satisfactory durable pavement.

In the embodiment illustrated, I `represents a pavement to be widened, 2 a vlongitudinal forni disposed in spaced relation tothe edge v3 of the pavement -I which -edge constitutes a `form element.

In `laying the pavement, the shoulder of the `pavement Vis excavated -to `the vdesired depth, -as I-irzlicated atri, to provide the foundation for the new-slab. 5 represents a 'tr-actorhaving ya current generated power unit 6 thereon. 1 represents aconcrete mixer of lthemotor vehicle type.

My apparatus :comprises a hopper 8 open at the Vbottom 'and preferably having inclined `side Walis i9, "9, an :inclined front Wall l0 and Ka 'veriti'cal @rear wall IVI. This hopper has .abottom discharge :opening while 'the rea-r 'wall H vhas a discharge topening 2| 2 .at the :bottom Athereof opening to the 'bottom ,discharge opening.

A concrete mixture indicated'at 1'3 is discharged into the hopper from the spout Hl of the mixer.

`The hopper is provided with shoes l5 adapted to travel on the form elementsthat is, V,one of the Vshoes is adapted to travel on the pavement which constitutes one of the form elements and the other upon the vlongitudinal form 2.

The side walls 9 have depending wing-'like vibratorymembers I6 which depend on the 'inner iside of the form elements and quit-e close thereto, these vibratory yelements being commonly designated as #spaoling elements-that is, tides7 `vibrate the concrete placed on the inner sides of the form elements, eliminating air pockets and honeycomb kstructure at A,this point.

The rear discharge opening is provided with vertical slidable gate Il' disposed on the slide- Ways i8 and vertically adjusted and supported 'in "its adjusted `position by means of the screws At the rear of the xhopper AIimount a vibrator-J strike-.oil or soreeding member '211, this vbeing supported Ain Aspaced opposed relation to the discharge opening of the Ahopper.

JThe ladj-ustable gate form-s in Aeffect a strike- -oii mernber-tloatis,it allows the desired lamountJ of 'concrete material lto pass out of the rear discharge opening.

The `vibratory Imerriber 2&1 is supported on the yhopper by means -of resilient connections 2l and 22, 'the members Z2 vbeing connected to the npturned 4ends -23 of the shoes while the mem-bers 21 Iare vconnected to the rear wall of the hopper v'at each `side of the ga-te. lThese Lmembers yare formed of relatively rigid reinforced rubber -cylinders or tube sections-that is, they are sufieiently rigid to support the member 2,9 in its `proper posi-tion and at the same time permitting high -lfrequency vibration thereof by the motor 2:4 lha-ving an Iunbalancedrotor 25. This motor is rigidly -f'ooltecl to the'rear side of the strike-ofi member. tThe vibration-s of fthe strikeoi member are transmitted with modified intensity through these support members 2i and 22 to the hopper and to the longitudinal vibratory vmem-bers .or rsp ading Ymembers 16..

This apparatus is propelled from the traetor .5 which l`has-.a l:laterally projecting bracket :26 .thereonirom"which'the Sdraitcables 2l extend tothe hopper. The :electrical connections from lthe :current .generator 6 to the Arncdsor Bri 'is partially indicated at i8.

#The high frequency vibration oi the strike-orf and Sthe reduced-vibrations loi the hopper and the spading elements is :such as Ato enable the .placement of relatively dry or harsh concrete mixes, the material being reduced to a suitable degree of fluidity by the vibrating walls of the hopper and the gate which constitutes a part of the wall and the strike-H or screed member.

The vibratory strike-off member 20 is provided with forwardly projecting wings 29 at the ends thereof designed to prevent excess concrete from spilling over the form elements and from passing around the ends of the strike-off. As shown in Fig. 2 the strike olf member 20 has a front surface for engaging the loose concrete forward thereof, and a relatively narrow bottom surface for engaging the concrete beneath the same, said surfaces meeting each other to form a relatively sharp concrete cutting edge to prevent the rising of the apparatus above the slab l and the side form 2 as the machine advances.

I have illustrated and described my pavement widening apparatus in an embodiment which I have found very satisfactory in the matter of eiectively placing the concrete and also as being of large capacity. It will be understood of course that the apparatus is designed for a particular width of strip to be added; also that it might be used for the laying of walks and the like.

I have not attempted to illustrate or describe the various modications and adaptations which I contemplate for different purposes or to meet various different conditions as it is believed that this disclosure will enable those skilled in the art to modify or adapt my improvements as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In an apparatus of the class described, the combination of a hopper having a bottom discharge opening and a rear discharge opening in its rear wall opening to the bottom discharge opening, a vertically adjustable gate for said rear discharge opening, adjusting means for said gate, shoes for said hopper, one of which is adapted to slide upon a pavement to be widened and the other upon a form element disposed in spaced relation to the edge of the pavement which constitutes a second form element, vibratory members on the side Walls of said hopper depending at the inner sides of said form elements and disposed for spading and packing concrete along said form elements, a vibratory strike-olf member disposed at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, resilient connections of substantial flexibility for said vibratory strike-off member to said hopper permitting high frequency vibration thereof, said connections transmitting vvibrations of lesser extent to said hopper and to'said depending vibratory members than are imparted to said vibratory strike-off member, and means for vibrating said vibratory strike-off member mounted thereon, the vibrations imparted to said strike-oil member including vertical movements thereto.

2. In an apparatus of the class described, the combination of a hopper having a bottom discharge opening and a rear discharge opening in` its rear wall opening to the bottom discharge opening, a vertically adjustable gate for said rear discharge opening, adjusting means for said gate, shoes for said hopper, one of which is adapted other upon a form element disposed in spaced relation to the edge of the pavement which constitutes a second form element, a vibratory strikeoif member disposed at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, resilient connections of substantial flexibility for said vibratory member to said hopper permitting high frequency vibration thereof, and means for vibrating said vibratory strike-off member mounted thereon, the vibrations imparted to said strike-off member including vertical movements thereto.

3. In an apparatus of the class described, the combination of a hopper having a bottom discharge opening and a rear discharge opening in its rear wall opening to the bottom discharge opening, shoes for said hopper, one of which is adapted to slide upon a pavement to be widened and the other upon a form element disposed in spaced relation to the edge of the pavement which constitutes a second form element, vibratory members on the side walls of said hopper depending at the inner sides of said form elements and disposed for spading and packing concrete along said form elements, a vibratory strike-off member mounted at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening i thereof to rearwardly support the material discharged therefrom, resilient connections of substantial flexibility for connecting said strike-ofcmember to said hopper, and means for vibrating said vibratory members and said vibrating strike- Aoff members at high frequency, the vibrations imparted to said strike-off member including vertical movements thereto.

4. In an apparatus of the` class described, the combination of a hopper having a bottom discharge opening and a rear discharge opening in its rear wall opening to the bottom discharge opening, a vertically adjustable gate for said rear discharge opening, shoes for said hopper, one of which is adapted to slide upon a pavement to be widened and the other upon a form element disposed in spaced relation to the edge of the pavement which constitutes a second form element, a vibratory strike-ofic member mounted at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, resilient connections of substantial flexibility for connecting said strike-olfV member to said hopper, and means for vertically vibrating said vibratory member at high frequency, said strike-off member having a surface to engage loose concrete at the front thereof and a bottom surface to engage the concrete beneath the same, said surfaces meeting each other to form a relatively sharp concrete cutting edge.

5. In an apparatus of the class described, the combination of ahopper adapted to-travel on longitudinal form elements, said hopper having a bottom discharge opening and a rear discharge opening in its rear wall opening to the bottom discharge. opening, a vertically adjustable gate for said rear discharge opening, vibratory members on the hopper disposed adjacent the inner sides of the form elements on which the hopper is traveling and disposed for spading and packing concrete along said form elements, a vibratory strike-off member disposed at the rear of and transverselyof the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, resilient connections of substantial flexibility for said vibratory member to said hopper permitting vibration thereof while transmitting vibrations of modified intensity to said hopper and to said depending vibratory member, and means for vibrating said vibratory strike-oli` member mounted thereon, the vibrations imparted to said strike-off member including vertical movements thereto.

6. In an apparatus of the class described, the combination of a hopper adapted to travel on longitudinal form elements, said hopper having a bottom discharge opening and a rear discharge opening, vibratory members on the hopper disposed adjacent the inner sides of the form elements on which the hopper is traveling and disposed for spading and packing concrete along said form elements, a vibratory strike-oil member disposed at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, resilient connections of substantial flexibility for said vibratory member to said hopper permitting vibration thereof while transmitting vibrations of modied intensity to said hopper and to said depending vibratory members, and means for vibrating said vibratory strike-off member mounted thereon, the vibrations imparted to said strike-off member including vertical movements thereto.

7. In an apparatus of the class described, the combination of a hopper adapted to travel on longitudinal form elements, said hopper having a bottom discharge opening and a rear discharge opening in its rear wall opening to the bottom discharge opening, a vertically adjustable gate for said rear discharge opening, a vibratory strike-off member disposed at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, resilient connections of substantial flexibility for said vibratory member to said hopper permitting vibration thereof, and means for vibrating said vibratory strike-off member mounted thereon, the vibrations imparted to said strike-olf member including vertical movements thereto.

8. In an apparatus of the class described, the combination of a hopper adapted to travel on longitudinal form elements, said hopper having a bottom discharge opening and a rear discharge opening, a vibratory strike-off member disposed at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, resilient connections of substantial flexibility for said vibratory member to said hopper ypermitting vibration thereof, and means for vibrating said vibratory strike-off member mounted thereon, the vibrations imparted to said strikeoff member including vertical movements thereto.

9. In an apparatus of the class described, the

combination of a hopper adapted to travel on longitudinal form elements, said hopper having a bottom discharge opening and a rear discharge opening in its rear wall, a vertically adjustable gate for said rear discharge opening, vibratory members on the hopper disposed adjacent the inner sides of the form elements on which the hopper is traveling and disposed for spading and packing concrete along said form elements, a vibratory strike-off member mounted at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, and means for vibrating said vibratory members and said vibratory strike-off member.

10. In an apparatus of the class described, the combination of a hopper adapted to travel on longitudinal form elements, said hopper having a bottom discharge opening and a rear discharge opening, vibratory members disposed adjacent the inner sides of the form elements on which the hopper is traveling and disposed for spading and packing concrete along said form, a vibratory strike-off member mounted at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, and means for vibrating said vibratory members and said vibratory strike-off member.

l1. In an apparatus of the class described, the combination of a hopper adapted to travel on longitudinal form elements, said hopper having a bottom discharge opening anda rear discharge opening in its rear Wall, a gate for said rear discharge opening, a vibratory strike-off member mounted at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to the rear discharge opening thereof to rearwardly support the material discharged therefrom, resilient connections of substantial flexibility for connecting said strike-olf member to said hopper, and means for vibrating said vibratory member, said strike-off member having a surface to engage loose concrete at the front thereof and a bottom surface to engage the concrete beneath the same, said surfaces meeting each other to form a relatively sharp concrete cutting edge.

12. In an apparatus of the class described, the combination of a hopper adapted to travel on longitudinal form elements, said hopper having a bottom discharge opening and a rear discharge opening in its rear wall, a vibratory strike-off member mounted at the rear of and transversely of the path of travel of the hopper in opposed spaced relation to 'said rear discharge opening, resilient connections of substantial flexibility for connecting said strike-off member to said hopper, said strike-off member having a relatively narrow bottom edge for engaging the concrete beneath the same and means for vibrating said strike-olf member.

CORW'ILL JACKSON. 

